AWS (Amazon Web Services) Certification Practice Exam

What service does Amazon CloudWatch provide regarding ECS containers?

1. Managing Docker images

2. Creating alarms based on metrics

3. Provisioning container networking

4. Scaling running instances automatically

The correct answer is: Creating alarms based on metrics

Amazon CloudWatch plays a critical role in monitoring resources and applications running on AWS, including Amazon ECS (Elastic Container Service) containers. One of its key features is the ability to create alarms based on specified metrics. This means that users can set thresholds for various performance indicators, such as CPU utilization, memory usage, and network traffic for their ECS containers. When these metrics reach predefined thresholds, CloudWatch can trigger alarms that notify users or initiate automated actions, allowing for proactive management of containerized applications. Creating alarms based on metrics is essential for maintaining application performance and reliability. It enables organizations to respond quickly to potential issues, ensuring that resources are managed efficiently. This functionality is particularly important in dynamic environments like ECS, where workloads can change rapidly. The other services mentioned all relate to container management in some capacity, but they do not directly represent the monitoring and alerting capabilities that CloudWatch provides for ECS containers. For instance, managing Docker images pertains to container storage and handling rather than monitoring. Provisioning container networking involves setting up networks for containers to communicate, while scaling running instances automatically involves resource management rather than the direct monitoring of performance metrics offered by CloudWatch. Thus, the ability to create alarms based on metrics is a defining feature of Amazon CloudWatch in